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/**
* WinPR: Windows Portable Runtime
* Debugging Utils
*
* Copyright 2014 Armin Novak <armin.novak@thincast.com>
* Copyright 2014 Thincast Technologies GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <fcntl.h>
#include <io.h>
#include <windows.h>
#include <dbghelp.h>
#include "debug.h"
#ifndef MIN
#define MIN(a, b) (a) < (b) ? (a) : (b)
#endif
typedef struct
{
PVOID* stack;
ULONG used;
ULONG max;
} t_win_stack;
void winpr_win_backtrace_free(void* buffer)
{
t_win_stack* data = (t_win_stack*)buffer;
if (!data)
return;
free(data->stack);
free(data);
}
void* winpr_win_backtrace(DWORD size)
{
HANDLE process = GetCurrentProcess();
t_win_stack* data = calloc(1, sizeof(t_win_stack));
if (!data)
return NULL;
data->max = size;
data->stack = calloc(data->max, sizeof(PVOID));
if (!data->stack)
{
free(data);
return NULL;
}
SymInitialize(process, NULL, TRUE);
data->used = RtlCaptureStackBackTrace(2, size, data->stack, NULL);
return data;
}
char** winpr_win_backtrace_symbols(void* buffer, size_t* used)
{
if (used)
*used = 0;
if (!buffer)
return NULL;
{
size_t line_len = 1024;
HANDLE process = GetCurrentProcess();
t_win_stack* data = (t_win_stack*)buffer;
size_t array_size = data->used * sizeof(char*);
size_t lines_size = data->used * line_len;
char** vlines = calloc(1, array_size + lines_size);
SYMBOL_INFO* symbol = calloc(1, sizeof(SYMBOL_INFO) + line_len * sizeof(char));
IMAGEHLP_LINE64* line = (IMAGEHLP_LINE64*)calloc(1, sizeof(IMAGEHLP_LINE64));
if (!vlines || !symbol || !line)
{
free(vlines);
free(symbol);
free(line);
return NULL;
}
line->SizeOfStruct = sizeof(IMAGEHLP_LINE64);
symbol->MaxNameLen = (ULONG)line_len;
symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
/* Set the pointers in the allocated buffer's initial array section */
for (size_t i = 0; i < data->used; i++)
vlines[i] = (char*)vlines + array_size + i * line_len;
for (size_t i = 0; i < data->used; i++)
{
DWORD64 address = (DWORD64)(data->stack[i]);
DWORD displacement;
SymFromAddr(process, address, 0, symbol);
if (SymGetLineFromAddr64(process, address, &displacement, line))
{
sprintf_s(vlines[i], line_len, "%016" PRIx64 ": %s in %s:%" PRIu32, symbol->Address,
symbol->Name, line->FileName, line->LineNumber);
}
else
sprintf_s(vlines[i], line_len, "%016" PRIx64 ": %s", symbol->Address, symbol->Name);
}
if (used)
*used = data->used;
free(symbol);
free(line);
return vlines;
}
}
char* winpr_win_strerror(DWORD dw, char* dmsg, size_t size)
{
DWORD rc;
DWORD nSize = 0;
DWORD dwFlags = 0;
LPTSTR msg = NULL;
BOOL alloc = FALSE;
dwFlags = FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS;
#ifdef FORMAT_MESSAGE_ALLOCATE_BUFFER
alloc = TRUE;
dwFlags |= FORMAT_MESSAGE_ALLOCATE_BUFFER;
#else
nSize = (DWORD)(size * sizeof(WCHAR));
msg = (LPTSTR)calloc(nSize, sizeof(WCHAR));
#endif
rc = FormatMessage(dwFlags, NULL, dw, 0, alloc ? (LPTSTR)&msg : msg, nSize, NULL);
if (rc)
{
#if defined(UNICODE)
WideCharToMultiByte(CP_ACP, 0, msg, rc, dmsg, (int)MIN(size - 1, INT_MAX), NULL, NULL);
#else /* defined(UNICODE) */
memcpy(dmsg, msg, MIN(rc, size - 1));
#endif /* defined(UNICODE) */
dmsg[MIN(rc, size - 1)] = 0;
#ifdef FORMAT_MESSAGE_ALLOCATE_BUFFER
LocalFree(msg);
#else
free(msg);
#endif
}
else
{
_snprintf(dmsg, size, "FAILURE: 0x%08" PRIX32 "", GetLastError());
}
return dmsg;
}
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